JP7212549B2 - lighting equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to an illumination device that irradiates and illuminates the periphery of an affected area, which is a surgical site.

Generally, the illuminance of the surgical site is defined as 10,000 lux to 100,000 lux. For this reason, high-intensity lighting such as shadowless lights is installed on the ceiling of the operating room to illuminate the surgical site. However, when the surgical site is located deep in the body, the light from the operating light may not reach the surgical site sufficiently due to the surrounding tissues blocking the light, resulting in insufficient illuminance.

As a means for solving this problem, a lighting device disclosed in Patent Document 1 is known. This illumination device consists of a light source installed at a location away from the surgical site and a light guide such as an optical fiber that transmits the light from this light source. It becomes possible. However, this device has a problem of high power consumption because it requires a light source with high illuminance due to transmission loss of the light guide.

In view of the above problems, the lighting devices disclosed in Patent Documents 2 and 3 have been created. These lighting devices are provided with a lighting unit capable of illuminating a predetermined place, a support unit to which the lighting unit is attached at one end so as to be movable in any direction, and a support unit provided at the other end of the support unit. , and a control unit capable of supplying electric power to the lighting unit. By installing the lighting unit near the surgical site, the surgical site can be locally illuminated.

JP 2015-123366 Special table 2018-527959 JP 2019-476

However, in the lighting devices disclosed in Patent Documents 2 and 3, the heat generated by the light-emitting elements raises the temperature of the lighting unit as a whole, and there is a risk of causing injury such as burns when the lighting unit comes into contact with the human body. In particular, the lens placed near the light emitting element is placed near the surgical site even though the temperature rises to the same extent as the light emitting element due to the radiant heat of the light emitting element. Therefore, there is a high risk of contact with the human body. Moreover, it is generally known that heat generated by a light-emitting element deteriorates and damages the light-emitting element and its peripheral parts. Problems such as an increase in the size of the support unit that supports this will occur. Therefore, in the conventional lighting device, large electric power cannot be applied to the light emitting element in order to suppress the amount of heat generated, resulting in insufficient illuminance.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide an illumination device capable of illuminating the vicinity of an operation site with high illuminance while preventing damage to the human body and damage to light-emitting elements due to heat generation. . In order to achieve this object, the present invention provides a lighting unit that illuminates a predetermined location, a support unit that has the lighting unit at one end, and a controller that connects the other end of the support unit and supplies power to the lighting unit. , wherein the lighting unit includes a hollow outer shell member having at least one opening, a light emitting element disposed inside the outer shell member and electrically connected to the control unit, and the outer shell member. and a main lens provided to close the open end of the shell member, and the light emitting element is arranged with its light emitting surface facing the main lens, and is connected to the outer shell member and the main lens. It is characterized by being arranged with a gap between. As a result, the lighting unit can form an air layer between the housing and the main lens, and the light emitting element and the heat sink. Do not get hot. In addition, it is preferable that the light-emitting element is supported by a heat dissipating body arranged in the outer shell member with a gap therebetween. As a result, the light-emitting element can dissipate the heat generated during light emission to the heat radiator connected to the light-emitting element.

Further, it is preferable that a sub-lens is provided inside the outer shell member between the main lens and the light-emitting element, and the light-emitting element is preferably disposed in contact with the sub-lens. Moreover, the secondary lens is preferably a plano-convex lens having a planar portion facing the light emitting element, and the light emitting element is preferably a surface-mounted light emitting diode. Further, the outer shell member incorporates a hollow inner shell member having at least one open end. The inner shell member is preferably inscribed and held concentrically with the outer shell member. Further, the control unit has a power supply connector electrically connected to a power supply, and the support unit has a wiring capable of electrically connecting the light emitting element and the power supply, and a power receiving connector directly connected to the wiring. Preferably, the power receiving connector and the power feeding connector are detachable. Moreover, it is preferable that the support unit has a form-maintaining function. Further, the light-emitting element preferably has a color temperature in the range of 5000 to 6500 K and a general color rendering index Ra of 98 or higher, and particularly preferably a special color rendering index R9 of 90 or higher.

According to the present invention, the heat generated by the light-emitting element is less likely to be transferred to the surface of the lighting unit due to the heat insulating effect of the air layer described above. . Also, due to the heat dissipation effect, there is no risk of damage to the light emitting element and peripheral parts. Due to these effects, in the lighting device of the present invention, it is possible to apply a large amount of power to the light emitting element, and the lens has a double structure to increase the degree of light collection, so that the illumination surface can emit light of 10,000 lux or more. There is an advantage that it becomes possible to ensure illuminance. In addition, since the light-emitting element is arranged in contact with the sub-lens, there is an advantage that the accuracy of positioning the light-emitting element at a predetermined position can be improved. This positioning accuracy is further improved when the secondary lens is a plano-convex lens, and is further improved when the light-emitting element is a surface-mounted light-emitting diode. In addition, since the housing has a double-tube structure in which a lens is arranged on each of the outer shell member and the inner shell member, although the above-mentioned excellent heat insulation effect and light collection accuracy can be obtained, the assembly is difficult. It is extremely easy, and since the inner shell member is inscribed and held concentrically with the outer shell member, there are advantages such as easy arrangement of the main lens and the sub lens in parallel and concentrically.

In addition, since the support unit and control unit are detachable, only the support unit and lighting unit installed near the surgical site can be sterilized or discarded after surgery, keeping the surgical site clean and Advantages include being able to reuse the control unit. Furthermore, since the support unit that supports the lighting unit has flexibility and shape maintenance function, it is possible to illuminate in an optimal posture, and there are advantages such as being able to illuminate the lighting position accurately. In addition, since the light emitting element used as the light source of the lighting device is a white LED that emits light close to that of sunlight, it is possible to clearly reproduce the color around the surgical site, and the reproduction rate of red is high. Therefore, there are advantages such as easy identification of blood and organs and the ability to obtain suitable lighting for the surgical site.

Schematic explanatory drawing of the illuminating device which concerns on this invention FIG. 2 is an enlarged, partially cutaway cross-sectional view of a main part showing the structure of the lighting unit according to the present invention; FIG. 2 is an enlarged, partially cutaway cross-sectional view of a main part showing the structure of a radiator of a lighting unit according to the present invention; FIG. 2 is an enlarged view of a main part seen from one end side of the lighting unit according to the present invention; FIG. 2 is an enlarged view of a main part of an embodiment in which a concave portion is formed in the inner peripheral surface of the outer shell member of the lighting unit according to the present invention, viewed from one end side;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described based on the drawings. 1 to 4, reference numeral 1 denotes a lighting device. This lighting device 1 includes a lighting unit 3 capable of illuminating a predetermined place, a support unit 2 supporting the lighting unit 3 at one end, and the support unit 2. and a control unit 4 to which the other end is connected.

The support unit 2 comprises a longitudinally extending hollow member 21 and wires 22, 22 inserted through the hollow member 21. Wires 22, 22 are connected to ends of the hollow member 21. A power receiving connector 23 is provided. In addition, the hollow member 21 is configured by coating a metal bellows body with a resin, and has flexibility to be deformed by an external force and a shape maintaining function to maintain an arbitrary shape even when the external force is removed. . Furthermore, one ends of the wirings 22, 22 are connected to a radiator 32 of the lighting unit 3, which will be described later. connect to.

The illumination unit 3 includes a hollow cylindrical inner shell member 314 in which a through hole 315 having a diameter that allows insertion of the hollow member 21 of the support unit 2 is formed in the axial direction, and an outer diameter of the inner shell member 314. It has a housing 31 comprising a hollow cylindrical outer shell member 311 through which a through hole 312 of the same diameter is formed through in the axial direction. The housing 31 has a double-pipe structure in which the inner shell member 314 is inscribed and inserted into the through hole 312 of the outer shell member 311 to hold them concentrically. A main lens 313 and a sub-lens 316 are hermetically adhered to one end of the inner shell member 314 with an adhesive or the like so as to close the respective open ends. Both the main lens 313 and the sub-lens 316 are plano-convex lenses, and are disposed on the outer shell member 311 and the inner shell member 314 so that the convex surfaces thereof face outward. A gap is provided to form an air layer between the lenses 313 and 316 . The distance between the lenses 313 and 316 is such that the illuminance of light emitted by the light-emitting element 33, which will be described later, is uniform on the effective irradiation surface (a surface that can ensure an illuminance of at least 10,000 lux), and the effective irradiation surface is possible. It is set to be as wide as possible, and the same distance is determined based on the refractive index of each lens 313,316.

The through hole 315 of the inner shell member 314 concentrically accommodates the cylindrical radiator 32 . The diameter of the through-hole 315 is set to be sufficiently larger than that of the radiator 32, thereby providing a gap between the through-hole 315 and the radiator 32 to form an air layer. . The radiator 32 has a light emitting element 33 concentrically connected to one end surface thereof, and the light emitting surface of the light emitting element 33 is arranged to face and abut on the sub lens 316 of the inner shell member 314 . . With this configuration, the secondary lens 316 is arranged between the main lens 313 and the light emitting element 33, and the light emitting surface of the light emitting element 33 is arranged to face the main lens 313. 33 and the outer shell member 315 and the main lens 313 are provided with a gap. Furthermore, the axial dimension of the inner shell member 314 is longer than the radiator 32 and sufficiently shorter than the outer shell member 315 , and the inner shell member 314 joins the radiator 32 and the support unit 2 together. , and the inner shell member 314 can be built in the outer shell member 311 . As a result, after inserting the inner shell member 314 which incorporates parts such as the radiator 32 and is connected to the support unit 2 into the outer shell member 311, it is possible to pour the resin 34 and the like from the other end side of the outer shell member 311. As a result, the lighting unit 3 is fixed to one end of the support unit 2 by curing the resin 34 .

The radiator 32 is formed by combining aluminum alloy main portions 321, 321 each formed in a semi-cylindrical shape. A conductive tape 323 made of copper or the like is attached to a surface from one end surface of each main body portion 321 to the other end surface through the flat portion 322. The element 33 and the electric wire 22 of the support unit 2 are connected to the other end surface by soldering. At least one of the main portions 321, 321 has a flat surface 322 and an outer peripheral surface covered with an insulating film tape 324 made of resin or the like, and the flat surface 322 is butted against the flat surface 322 of the other main portion 321. At this time, the main body portions 321, 321 and the conductive tapes 323, 323 are configured to prevent contact with each other. The radiator 32 has a volume much larger than that of the light emitting element 33, so that the heat radiator 32 has a sufficient heat capacity for the amount of heat generated by the light emitting element 33. ing. Furthermore, the radiator 32 is covered with an insulating film tape 325 on its periphery. It is configured to prevent electric leakage to 31.

The light-emitting element 33 is a surface-mounted LED (light-emitting diode), and is a white light-emitting LED that emits light close to that of sunlight. Specifically, it is preferable that the color temperature representing the color of light is in the range of 5000 to 6500 K, and the general color rendering index Ra representing the reproduction of sunlight is 98 or more. A color rendering index R9 of 90 or more is preferred.

The control unit 4 has a power supply wiring section 41 having a power plug (not shown) that can be directly connected to a power outlet (not shown, hereinafter referred to as an outlet) of an external commercial power supply (hereinafter referred to as a power supply). , this power supply wiring portion 41 is connected to an electric circuit 42 . The electric circuit 42 includes a rectifying circuit 42a that converts the alternating current sent from the power supply wiring section 41 into direct current, a constant voltage circuit 42b that converts the direct current voltage rectified by the rectifying circuit 42a into a predetermined value, and the and a dimming circuit 42c for adjusting the current output from the constant voltage circuit 42b to a predetermined value. . The power supply connector 44 is configured to be detachable from the power receiving connector 23 , and the control unit 4 and the support unit 2 are electrically connected by connecting these connectors 44 and 23 . The dimming circuit 42c is composed of a variable resistor that changes its resistance value steplessly by rotating it, a push button switch that changes its resistance value step by step by pushing it, and the like. It is connected to the adjusting means 43 .

Next, the operation of the illumination device 1 configured as described above will be described.
The control unit 4 connected to the power supply is installed near the patient to be treated, and the power receiving connector 23 of the support unit 2 is connected to the power supply connector 44 of the control unit 4 . At this time, the rectifying circuit 42a and the constant voltage circuit 42b of the electric circuit 42 of the control unit 4 convert the electricity transmitted from the power supply wiring portion 41 into a direct current and a predetermined voltage suitable for the light emitting element 33 and supply it to the support unit 2. be done. The electricity converted to suit the light emitting element 33 is supplied to the light emitting element 33 through the wiring 22 of the support unit 2 and the conductive tape 323 of the radiator 32 connected to the wiring 22, thereby 33 emits light. At this time, since the main body 321 of the radiator 32 and the outer circumference of the radiator 32 are covered with the insulating film tapes 324 and 325, short circuit and electric leakage between the main bodies 321 and 321 are prevented. In addition, even if the radiator 32 and the housing 31 should come into contact with each other, it is possible to prevent a short circuit or electric leakage caused by this. After the light emitting element 33 emits light, the amount of electricity supplied to the light emitting element 33 can be adjusted by changing the resistance value of the variable resistor of the adjusting means 43 connected to the dimming circuit 42c of the control unit 4. It becomes possible, and it becomes possible to change the illumination intensity of the light emitting element 33 arbitrarily.

Light emitted by the light emitting element 33 forms an irradiation surface of a predetermined range through the lenses 313 and 316 of the lighting unit 3 . At this time, the radiator 32 and the light emitting element 33 are fixed to the inner shell member 314 by the resin 34 at the other ends while the light emitting element 33 is in contact with the sub-lens 316. 33 can always be positioned at a predetermined position, and vibration and displacement of the light emitting element 33 due to vibration during use can be prevented. In particular, since the sub-lens 316 is composed of a plano-convex lens, it is easy to dispose and hold the light-emitting element 33 at the center position of the sub-lens 316 . Moreover, since the light-emitting element 33 is composed of a surface-mounted LED, the position of the light-emitting element 33 or the radiator 32 is greatly shifted by bringing the light-emitting surface of the light-emitting element 33 into contact with the plane of the sub-lens 316 . A difficult structure can be obtained. As a result, in the illumination device 1, the effective illumination surface, the illumination range, and the light collection accuracy of the lenses 313 and 316 are all kept uniform, so that the desired illumination position can be accurately illuminated.

When the illumination unit 3 is used to illuminate the surgical site, the illumination unit 3 can be arranged at an arbitrary position by bending or bending the support unit 2 . Therefore, even when the surgical site to be illuminated changes from time to time or when the patient's posture is changed, the lighting unit 3 can be freely arranged in an optimal position and orientation that is convenient for the operator each time. It becomes possible to illuminate the position accurately. In addition, since the main body 321 of the lighting unit 3 is made of an aluminum alloy or the like, and the conductive tape 323 is adhered to these, the lighting unit 3 can be made easier than when the main body 321 is made of copper or the like. Weight can be reduced. Therefore, it is possible to prevent the support unit 2 from being bent during lighting due to the weight of the lighting unit 3, thereby preventing the irradiation range from being changed, and miniaturizing the support unit 2 supporting the lighting unit 3 as much as possible. becomes possible.

When illuminating the surgical site, light that provides an illuminance of 10,000 lux on the irradiated surface is required, so a larger current than in the conventional case is applied to the light emitting element 33 . As a result, it is possible to satisfactorily illuminate the affected/operated area. When illuminating the surgical site, the light-emitting element 33 is a white light-emitting LED that emits light close to that of sunlight, so the colors around the surgical site can be clearly reproduced, and the colors of organs, blood, etc. can be reproduced more accurately. is possible, and it is possible to assist identification of the affected area.

As described above, the light-emitting element 33 is heated by a large amount of electric current, and this heat is absorbed by the radiator 32 connected to the light-emitting element 33. Therefore, excessive heat generation of the light emitting element 33 is prevented. Since the radiator 32 has a large capacity with respect to the light emitting element 33 during this heat dissipation, the light emitting element 33 can continue to radiate heat to the radiator 32 even in long-term use. In addition, since air layers are formed between the radiator 32 and the inner shell member 314 and between the main lens 313 and the sub-lens 316, the heat generated by the light emitting element 33 is reduced by the heat insulating effect of the air layers. It is difficult to transmit to the surface of the lighting unit 3. Therefore, even if the lighting unit 3 should come into contact with the human body, there is no risk of injury such as burns. Since the lighting device 1 of the present invention has the heat radiation effect and the heat insulation effect as described above, it is possible to apply a larger current to the light emitting element 33 as described above, and illumination with high illuminance is possible.

In addition, since the housing 31 has a double-tube structure in which the inner shell member 314 having the secondary lens 316 is enclosed in the outer shell member 311, for example, it is configured to have a single-tube structure with only the outer shell member 311. Assembly is easier than when the main lens 313 and the secondary lens 316 are assembled to the housing 31, and the secondary lens 316 is less likely to tilt during assembly. Moreover, since the inner shell member 314 has the same diameter as the through hole 312 of the outer shell member 311, and the inner shell member 314 is held concentrically with the outer shell member 311, the lenses 313 and 316 can be aligned parallel and concentrically during assembly. It is easy to arrange, and furthermore, it is possible to prevent the inner shell member 314 from vibrating or shifting due to vibration or the like during use.

Since the lighting device 1 is configured such that the support unit 2 and the control unit 4 can be attached and detached via the power supply connector 44 and the power receiving connector 23 as described above after use and storage, the illumination device 1 can be installed near the surgical site. Only the supporting unit 2 and the lighting unit 3 which are attached can be discarded, sterilized, etc. after surgery. This makes it possible to reuse the control unit 4, which has a relatively complicated configuration and is expensive, while always keeping the area around the surgical site clean. In addition, the housing 31 of the lighting unit 3 installed near the surgical site during illumination has the lenses 313 and 316 airtightly adhered to one end thereof, and the resin 34 is poured into the housing 31 of the other end thereof to ensure airtightness. Therefore, blood or the like does not enter the inside of the support unit 2 or the lighting unit 3, thereby preventing contamination, short circuits, etc. caused by these.

It should be noted that the illumination device 1 according to the present invention is not limited to the one described above, and various modifications are possible without departing from the spirit of the invention. For example, as shown in FIG. 5, the housing 31 may be provided with a concave portion 317 on the inner peripheral surface of the through hole 312 of the outer shell member 311 . As a result, an air layer is formed between the outer shell member 311 and the inner shell member 314, and this air layer further enhances the heat insulating effect, further suppressing the surface temperature rise of the lighting unit 3 due to the heat of the light emitting element 33. be able to.

Moreover, the lighting device 1 may change the power source from an external commercial power source to a battery or the like. By doing so, it is possible to increase the flexibility of the installation location of the control unit 4 regardless of the position of the power outlet. Further, although the light emitting element 33 and the like are connected to the conductive tape 323 by soldering, the connection method or the like may be appropriately changed according to the application, such as by connecting this with a conductive adhesive or the like. Furthermore, a plurality of power supply connectors 44 may be provided in the control unit 4 . At this time, the electric circuit 42 to which these power supply connectors 44 are connected may be provided for each power supply connector 44 , and a plurality of power supply connectors 44 are configured to be connected to one electric circuit 42 . Also good. As a result, a single control unit 4 can simultaneously irradiate a plurality of locations.

Reference Signs List 1 lighting device 2 support unit 21 hollow member 22 wiring 3 lighting unit 31 housing 311 outer shell member 313 main lens 314 inner shell member 316 secondary lens 32 radiator 33 light emitting element 4 control unit 41 power supply wiring section 42 electric circuit 43 adjustment means

Claims (9)

A lighting device comprising a lighting unit that illuminates a predetermined location, a support unit that includes the lighting unit at one end, and a control unit that connects the other end of the support unit and supplies power to the lighting unit,
The lighting unit comprises a hollow outer shell member with at least one open end, a main lens provided by closing the open end of the outer shell member, and a hollow inner shell built into the outer shell member and open at least one end. a sub-lens for closing the open end of the member and the inner shell member; a radiator disposed within the outer shell member with a gap therebetween; and a light-emitting element supported by the radiator,
The light-emitting element is electrically connected to the control unit, and arranged such that its light-emitting surface faces the sub-lens and has a gap between itself and the inner shell member. lighting device. 2. The illumination device according to claim 1 , wherein the light emitting element is arranged in contact with the sub-lens. 3. The illumination device according to claim 2 , wherein the secondary lens is a plano-convex lens arranged such that a planar portion faces the light emitting element. 4. The lighting device according to claim 2 , wherein the light-emitting element is a surface-mounted light-emitting diode. 2. The lighting device according to claim 1 , wherein the inner shell member is inscribed and held concentrically with the outer shell member. The control unit has a power supply connector electrically connected to the power supply,
The support unit has a wiring capable of electrically connecting the light emitting element and the power supply, and a power receiving connector directly connected to the wiring,
6. The lighting device according to claim 1 , wherein the power receiving connector and the power feeding connector are configured to be detachable. 7. The lighting device according to any one of claims 1 to 6 , wherein the support unit has a shape maintaining function. 8. The lighting device according to claim 1 , wherein the light emitting element has a color temperature within a range of 5000 to 6500 K and a general color rendering index Ra of 98 or higher. 9. The lighting device according to any one of claims 1 to 8 , wherein the light emitting element has a special color rendering index R9 of 90 or more.

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